bugfix for how gdal undefined values are handled

changed how undefined gdal values create numpy NaNs

as testing with == didn't work for -3.402823e+38 as gdal_undef,  I now test for 
< gdal_undef+0.00001 for negative undefs and > gdal_undef-0.00001 for positive undefs

v1.24

bug fix - fixed a x/y dimension mixup that resulted in incorrect print resolution

v1.23

update GMTED resolution

Optional Google Maps key

If a file called GoogleMapsKey.txt in the serve folder contains a valid google maps key, it will be inlined into index.html which should result in a proper Google Map. Not having this file will result in a Google Map that's crappy but still works. Having a invalid key will result in no map at all.

Added DEM geotiff to zipfolder

• the DEM supplied by Google Earth Engine is now added to the files in the zipped folder. It's called DEM.tif
• fixed a bug where the printresolution was wrong in some cases of multi tiles

Public Release after fix for antialising artifacts

v1.20

put back TouchTerrainEarthEngine.py after removing it by accident for…

Bryson's fix

Fixed antialiasing artifacts (line) that would sometimes show up. Google Earth Engine defaults to using nearest neighbor for resampling/projection, was changed to bi-linear.
(Thanks to Bryson Hicks)

For standalone, I added printres = -1 which will not resample the original raster DEM from file but instead create a model at the original raster resolution.

v1.18

v1.18

Jan 2018

tile size limited to 200mm, printres limited to >0.2mm

Halloween

version for Shane